Existence of panmictic Hilsa shad (Tenualosa ilisha) populations from two large river ecosystems in Bangladesh revealed by mitochondrial control region

The present study was undertaken to estimate genetic diversity and reveal population structure of Hilsa shad (Tenualosa ilisha) from two large river ecosystems, the Padma Meghna Bangladesh using mitochondrial control region (D-loop region). Fin tissue samples 60 individuals were collected (ChapaiNawabgonj) River (Chandpur). DNA extracted D-loopof mtDNA amplified, purified sequenced. A total 35 Sequences (15 20 population) analyzed 14 haplotypes detected. Total16 polymorphic sites identified that included11 singleton 5 parsimony informative sites. These populations showed high haplotype (h) (0.863 in 0.901in population). We found low nucleotide (Pi) within each population, 0.0058±0.0039 0.0063±0.004 population. shared among as 28.57%, rest 71.43% private haplotypes. Estimate differentiations (Fst) suggest closely related (Fst= 0.058, P=0.07). TCS genealogy three main separated by mutational steps hap_10 might be most ancestral its internal position network. All results panmixia T. ilisha between thus similar management plan could useful for these fishery Bangladesh.